Modelling the impaction of a micron particle with a powdery layer

Abd-Elhady, M.S.; Rindt, Ccm Camilo; Wijers, JG Johan; Steenhoven, van Aa Anton

doi:10.1016/j.powtec.2006.06.013

Cited by 46 publications

(15 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This finding may be explained on the basis of the fact that the powder layer separates the impinging particles from the wall substrates, and the particles partially penetrate the powder layer. These phenomena determine energy dissipation, hence smaller coefficients of restitution, as reported in the literature [54,55]. This finding is very relevant to the assessment of the fate of char/ash particles in EF slagging gasifiers.…”

Section: Rebound Characteristics In the Nsp-nsw Regimesupporting

confidence: 66%

Multiphase flow patterns in entrained-flow slagging gasifiers: Physical modelling of particle–wall impact at near-ambient conditions

Troiano

Solimene

Salatino

et al. 2016

Fuel Processing Technology

View full text Add to dashboard Cite

Section: Rebound Characteristics In the Nsp-nsw Regimesupporting

confidence: 66%

Multiphase flow patterns in entrained-flow slagging gasifiers: Physical modelling of particle–wall impact at near-ambient conditions

Troiano

Solimene

Salatino

et al. 2016

Fuel Processing Technology

View full text Add to dashboard Cite

“…where is the surface energy between the interacting bodies, R the radius of the particle, ρ the density of the particle, and E* the reduced Young's modulus, which is calculated from Abd-Elhady et al [25] by…”

Section: Discusion Of Resultsmentioning

confidence: 99%

Optimization of Flow Direction to Minimize Particulate Fouling of Heat Exchangers

Abd-Elhady

Rindt

Steenhoven

2009

Heat Transfer Engineering

View full text Add to dashboard Cite

The influence of flow direction with respect to gravity on particulate fouling of heat exchangers is investigated experimentally to determine the optimal flow direction to minimize fouling. Four orientations of flow have been investigated: horizontal flow, upward flow, downward flow, and a flow under an angle of 45 • . It is observed that fouling starts at the point of stagnation irrespective of the flow direction, and also at the top of the heat exchanger tubes. Particulate fouling grows from these two points till they meet and the fouling layer covers the whole surface of the heat exchanger tube. Fouling at the upper half of the tubes is much faster than the lower half of the tubes, and the fouling rate is faster at the bottom tubes of the heat exchanger section than at the upper tubes. The best orientation for lingering particulate fouling is the downward flow, where the flow stagnation point coincides with the top point of the heat exchanger tubes and the growth of the fouling layer only starts from one point.

show abstract

“…Firstly, the normal restitution coefficient increases with increasing incident velocity, and then the normal restitution coefficient decreases with increasing incident velocity. The Rogers and Reed model was solved for a copper particle of 50 μm diameter hitting a massive steel plate at different impact speeds by Adb-Elhady et al [37]. The copper particle was chosen to represent the soft fouling particle in gasified biomass and the steel plate to represent the heat exchanger tubes.…”

Section: Normal Coefficient Of Restitutionmentioning

confidence: 99%

Experimental Studies on the Normal Impact of Fly Ash Particles with Planar Surfaces

Dong

Xie

et al. 2013

Energies

View full text Add to dashboard Cite

This paper presents the results of a comprehensive program of experiments in which fly ash particles were impacted under controlled conditions against a flat steel surface. The overall aim of these experiments was to gain an understanding of the ash deposition process in a pulverized coal boiler system. A continuous nitrogen flow carrying fly ash particles was used to examine the effect of particle incident velocity and particle diameter (d p ) on the normal restitution coefficient, and of the particle diameter on the critical velocity. The effect of the incident normal velocity and particle diameter on the normal restitution coefficient was also examined. The results show that the normal restitution coefficient increases rapidly with increasing incident velocity when this incident velocity is less than the yield velocity, and rapidly decreases with increasing incident velocity when the incident velocity is greater than the yield velocity. The critical velocity, determined solely by the first-contact energy loss, is proportional to d p −5/6 and therefore becomes larger for smaller particles. For instance, in the present work, the velocity v c of a particle with diameter of 85 μm is 0.19 m/s, which increases to 0.42 m/s for particles with a diameter of 65 μm.

show abstract

Modelling the impaction of a micron particle with a powdery layer

Cited by 46 publications

References 20 publications

Multiphase flow patterns in entrained-flow slagging gasifiers: Physical modelling of particle–wall impact at near-ambient conditions

Multiphase flow patterns in entrained-flow slagging gasifiers: Physical modelling of particle–wall impact at near-ambient conditions

Optimization of Flow Direction to Minimize Particulate Fouling of Heat Exchangers

Experimental Studies on the Normal Impact of Fly Ash Particles with Planar Surfaces

Contact Info

Product

Resources

About